People taking GCSE courses will often look down on BTEC students, and use the term 'BTEC' as an insult to them.
It can then be more broadly used to mean 'stupid'
'Hey Cameron, you're so rubbish at this, you're so BTEC'
'Why would you do that? That's such a BTEC mistake to make'
An accronym for 'Babs the Ejaculating Cow'
I asked BTEC if i could borrow his copy of Primal Fear